Optical laminate and image display device

An optical laminate comprising:

• a light absorption anisotropic layer containing a dichroic substance;
• a photo-alignment film;
• and
• a base material in order,
• wherein the photo-alignment film contains a specific compound having a refractive index of 1.55 to 1.70,
• wherein the base material has a glass transition temperature of 150° C. or higher, and
• wherein the base material consists of a cellulose acylate-based film that satisfies at least one of Condition 1 or Condition 2,
• Condition 1:
• the cellulose acylate-based film contains 1% to 20% by mass of a compound represented by Formula (1)
• Condition 2:
• the cellulose acylate-based film contains 0.1% to 10% by mass of a compound represented by Formula (2) or (3)
• B-(G-A)n-G-B (1)
• in Formula (1),
• n represents an integer of 0 or greater,
• B represents an acyl group having at least one aromatic ring, where a plurality of B's may be the same as or different from each other,
• G represents an alkylene glycol residue, an aryl glycol residue, or an oxyalkylene glycol residue, where in a case where n represents an integer of 1 or greater, a plurality of G's may be the same as or different from each other, and
• A represents an alkylene dicarboxylic acid residue or an aryl dicarboxylic acid residue, where in a case where n represents an integer of 2 or greater, a plurality of A's may be the same as or different from each other,
• in Formula (2),
• R1, R2, R3, R4, and R5 each independently represent a hydrogen atom, a halogen atom, a nitro group, a hydroxy group, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an aryl group which may have a substituent, an alkoxy group which may have a substituent, an acyloxy group which may have a substituent, an aryloxy group which may have a substituent, an alkylthio group which may have a substituent, an arylthio group which may have a substituent, a mono-or dialkylamino group which may have a substituent, an acylamino group which may have a substituent, or a 5- to 6-membered heterocyclic group, where R4 and R5 may be bonded to each other to form a 5- to 6-membered carbon ring,
• in Formula (3),
• R6, R7, R8, and R9 each independently represent a hydrogen atom, a halogen atom, a hydroxy group, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkoxy group which may have a substituent, a phenyl group which may have a substituent, a cycloalkyl group which may have a substituent, an alkylcarbonyl group which may have a substituent, an alkylsulfonyl group which may have a substituent, or a —CO(NH)m-1-D group, D represents an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or a phenyl group which may have a substituent, and m represents 1 or 2.